Physics 2 Online Quiz 2: Work, Energy, Power

15 Questions  I  By Sir_july@ntma on August 9, 2010
This quiz includes the topics on Work, Energy and Power.  The quiz is consisting of 15 multiple-choice items, which are all conceptual.  Time limit for the quiz is 15 minutes.  Good luck.

  

Question Excerpt

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1.  A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory.  When it returns to its original level after encountering air resistance, its kinetic energy is _____.   
A.
B.
C.
D.
2.  A feather and a coin dropped in a vacuum fall with equal _____.
A.
B.
C.
D.
3.  An object that has potential energy has this energy because of its _____.  
A.
B.
C.
D.
4.  When an object is lifted 10 meters, it gains a certain amount of potential energy. If the same object is lifted 20 meters, its potential energy is ______.
A.
B.
C.
D.
5.  Which of the following is not a unit for power?  
A.
B.
C.
D.
6.  Strictly speaking, a car will burn more gasoline if the car radio is turned on.  This statement is _____.
A.
B.
C.
D.
7.  An object that has kinetic energy must be _____.
A.
B.
C.
D.
8.  Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale.  The faster arrow will penetrate _____.
A.
B.
C.
D.
9.  An object is raised above the ground gaining a certain amount of potential energy.  If the same object is raised twice as high it gains _____.
A.
B.
C.
D.
10.  How many Joules of energy are in one kilowatt-hour?
A.
B.
C.
D.
11.  A feather and a coin are dropped in the air.  Each falls with equal _____.
A.
B.
C.
D.
12.  When a bullet is fired from a rifle, the force on the rifle is equal to the force on the bullet.  However, the energy of the bullet is greater than the energy of the recoiling rifle because the _______.  
A.
B.
C.
D.
13.  Two identical arrows, one with twice the speed of the other, are fired into a hay bale.  The faster arrow will penetrate _____.
A.
B.
C.
D.
14.  Car A has a mass of 1000 kg and a speed of 60 km/h, and car B has a mass of 2000 kg and a speed of 30 km/h.  The kinetic energy of car A is _____.  
A.
B.
C.
D.
15.  If an object has kinetic energy, then it also must have _____.     
A.
B.
C.
D.
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